Booting 2.6.25-rc3 on my Ultra5 causes a hang before or asthe console is switched over to the framebuffer. The consoleoutput is (extrapolated from dmesg in -rc2 and handwrittennotes, as I don't have a serial cable to my U5):

Another difference is that with rc2 the first few lines of kerneloutput while the console is still in OF mode either aren't shownor disappear quickly since the switch to the framebuffer occurswithin a fraction of a second after the kernel has been loaded.With rc3 the kernel output (the text shown above) in the OF-modeconsole is very very slow.

(I should have quoted my .config here but I forgot to bring it.It's exactly the same in rc2 and rc3, however.)